Flurry's Peter Farago broke it down on the Flurry blog.
"iPad made up 22% of new projects starts within Flurry over the last 60 days. In March, over 3,000 unique applications were created within Flurry. A second point of interest is that Android's share of new project starts has decreased from 18% to 8%."
However, Farago cautions against concluding that Android development is falling off.
"Android's percent has declined because iPhone and iPad growth is increasing at a rate faster than that of Android."
He also notes that Blackberry development is down, with only 1% of developers tackling that device, down from 4% in 2009. This is within the Flurry system of developers, it is worth noting.
The following graphic consists of "averages taken across 2009 vs. the last 60 days."
The take-away, in addition to the current spike of popularity for the iPad among developers, is the fact that "(t)he total pie is growing significantly, month over month."
Update: A typo in the Flurry report indicated that "Android's share of new project starts has decreased from 18% to 8%." It should, reflecting the graphic, say that it had "decreased from 18% to 10%."